On Saturday, 29 January 2022 at 18:28:06 UTC, Ali Çehreli wrote:
On 1/29/22 10:04, Salih Dincer wrote:
> Could you also try the following code with the same
configurations?
The program you posted with 2 million random values:
ldc 1.9 seconds
gdc 2.3 seconds
dmd 2.8 seconds
I understand such short tests are not definitive but to have a
rough idea between two programs, the last version of my program
that used sprintf with 2 million numbers takes less time:
ldc 0.4 seconds
gdc 0.5 seconds
dmd 0.5 seconds
(And now we know gdc can go about 7% faster with additional
command line switches.)
Ali
You need to be compiling with PGO to test the compilers optimizer
to the maximum. Without PGO they have to assume a fairly
conservative flow through the code which means things like
inlining and register allocation are effectively flying blind.
